观测场内仪器高的设施安置在（），低的仪器设施安置在（）。
参考答案：北面；南面
Only when you experience the bad earthquake taking place in Si Chuan______ the importance of life.
A．can you understand
B．are you understand
C．do you understand
D．did you understand
变压器热油循环过程中当环境温度全天平均低于（）℃时，应对油箱采取保温措施。
A.5
B.10
C.15
D.20
